A rare-earth ore-alkali decomposition tubular reaction device and process

Abstract

The invention discloses a rare earth ore alkali decomposition tube type reaction device and process. The device comprises the following parts including a high-pressure diaphragm pump, an inner heating reaction tube, a far infrared heater, an inner heat insulating reaction tube, a static helical agitator and an outer tube. According to the process, rare earth ore pulp is fed into the inner heating reaction tube through the high-pressure diaphragm pump, the pulp in the inner heating reaction tube is heated through the far infrared heater in the outer tube and enters the inner heat insulating reaction tube after being heated to the alkali decomposition temperature, and 30-60 min later, the pulp is conveyed to the subsequent solid-liquid separation procedure. According to the rare earth ore alkali decomposition tube type reaction device and process, the technological flow can be simplified, the reaction speed can be increased, the alkali decomposition time can be shortened by 50-70%, the heat transfer efficiency is improved, the resistance loss of a pipeline is reduced, and the overall energy consumption is reduced. Adopted far infrared rays can be absorbed by the rare earth ore pulp easily and converted into internal energy of objects, the heating efficiency is high, and the advantage of facilitating temperature control and maintenance is further achieved.

Description

technical field [0001] The invention relates to a rare-earth ore-alkali decomposition tubular reaction device and process, belonging to the field of rare-earth ore smelting and production. Background technique [0002] In industry, the caustic soda decomposition method is often used to process rare earth ores such as monazite, xenotime, bastnaesite, Baotou mixed rare earth ore, and brown yttrium niobium ore. The traditional process is to use caustic soda and concentrate to enter the decomposition reaction according to the proportion. The kettle is heated with a steam jacket to make the reaction under normal pressure or high pressure, and the rare earth hydroxide is separated from the soluble phosphate and fluoride through alkali conversion, and then enters the following solid-liquid separation process to obtain the rare earth hydroxide filter cake . [0003] Traditional rare earth ore alkali decomposition reaction equipment generally adopts multi-stage kettle-type reaction ...

AI Technical Summary

Problems solved by technology

[0003] Traditional rare earth ore alkali decomposition reaction equipment generally adopts multi-stage kettle-type reaction devices, with many transmission equipment, many equipment, and a relatively long process. The time is as long as several hours to tens of hours, the energy is relatively high, and the decomposition rate of rare earth is not high (generally about 96%), resulting in the loss of rare earth

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